Error message in 0.8 not much helpful as compared to 0.7
--------------------------------------------------------
Key: PIG-1808
URL: https://issues.apache.org/jira/browse/PIG-1808
Project: Pig
Issue Type: Bug
Affects Versions: 0.8.0
Reporter: Vivek Padmanabhan
Priority: Minor
A = LOAD 'i1' ;
B = LOAD 'i2' ;
C = JOIN A by $92 left outer,B by $92 ;
D = filter C by $100 is null;
DUMP D;
The below script fails both in 0.7 and 0.8 since A requires a valid schema to
be defined. But the error message in 0.8 is not helpful.
Error message in 0.8
-----------------------------
ERROR 2000: Error processing rule PushUpFilter. Try -t PushUpFilter
org.apache.pig.impl.logicalLayer.FrontendException: ERROR 1066: Unable to open
iterator for alias D
....
Caused by: org.apache.pig.impl.logicalLayer.FrontendException: ERROR 2042:
Error in new logical plan. Try -Dpig.usenewlogicalplan=false.
....
Caused by: org.apache.pig.impl.logicalLayer.FrontendException: ERROR 2000:
Error processing rule PushUpFilter. Try -t PushUpFilter
....
Caused by: java.lang.NullPointerException
at
org.apache.pig.newplan.logical.rules.PushUpFilter$PushUpFilterTransformer.hasAll(PushUpFilter.java:308)
at
org.apache.pig.newplan.logical.rules.PushUpFilter$PushUpFilterTransformer.check(PushUpFilter.java:141)
at
org.apache.pig.newplan.optimizer.PlanOptimizer.optimize(PlanOptimizer.java:108)
... 13 more
Error message in 0.7
-----------------------------
org.apache.pig.impl.logicalLayer.FrontendException: ERROR 1066: Unable to open
iterator for alias D
....
....
Caused by:
org.apache.pig.backend.hadoop.executionengine.physicalLayer.LogicalToPhysicalTranslatorException:
ERROR 1109: Input (B) on which outer join is desired should have a valid schema
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